Z91.A — Caregiver's noncompliance with patient's medical treatment and regimen
Z91.A is a non-billable header ICD-10-CM code for caregiver's noncompliance with patient's medical treatment and regimen. It cannot be billed on its own: choose one of the more specific child codes below.
Excludes2 inherited from the categories above Z91.A
Also inherited, and the opposite of Excludes1: these conditions are not part of Z91.A, but a patient can have both, so you may code both.
Written on Z91 — Personal risk factors, not elsewhere classified
Risk adjustment
Z91.A does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
Code history
Z91.A has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.
Code to one of these instead Z91.A
6 child codes. Green means billable.
- Z91.A1Caregiver's noncompliance with patient's dietary regimen
- Z91.A2Caregiver's intentional underdosing of patient's medication regimen
- Z91.A3Caregiver's unintentional underdosing of patient's medication regimen
- Z91.A4Caregiver's other noncompliance with patient's medication regimen
- Z91.A5Caregiver's noncompliance with patient's renal dialysis
- Z91.A9Caregiver's noncompliance with patient's other medical treatment and regimen
Related codes at this level
Codes that share Z91. If Z91.A is not quite right, the correct code is usually one of these.
- Z91.0Allergy status, other than to drugs and biological substances
- Z91.1Patient's noncompliance with medical treatment and regimen
- Z91.4Personal history of psychological trauma, not elsewhere classified
- Z91.5Personal history of self-harm
- Z91.8Other specified personal risk factors, not elsewhere classified
- Z91.BPersonal risk factor of exposure to diethylstilbestrol
Questions about Z91.A
- Is Z91.A a billable ICD-10-CM code?
- No. Z91.A is a non-billable header code. Code to a higher level of specificity using one of its child codes.
- Where does Z91.A sit in the tabular list?
- Factors influencing health status and contact with health services (Z00-Z99), in the block Persons with potential health hazards related to family and personal history and certain conditions influencing health status (Z77-Z99).